using Hua.Todo.Application.Models;
using Hua.Todo.Core.Entities;
using Xunit;

namespace Hua.Todo.Host.Tests.Attachments;

/// <summary>
/// 工单 04 附件与描述数据模型测试。
/// </summary>
public class AttachmentModelTests
{
    [Fact]
    public void AttachmentEntity_DefaultValues_AreCorrect()
    {
        var entity = new AttachmentEntity();

        Assert.Equal(Guid.Empty, entity.Id);
        Assert.Equal(Guid.Empty, entity.TaskId);
        Assert.Equal(string.Empty, entity.FileName);
        Assert.Equal(string.Empty, entity.FilePath);
        Assert.Equal(0L, entity.FileSize);
        Assert.Equal(string.Empty, entity.ContentType);
        Assert.Equal(AttachmentType.LocalFile, entity.AttachmentType);
        Assert.True(entity.CreatedAt <= DateTime.UtcNow);
    }

    [Fact]
    public void AttachmentType_LocalFile_IsZero()
    {
        Assert.Equal(0, (int)AttachmentType.LocalFile);
    }

    [Fact]
    public void AttachmentType_ExternalLink_IsOne()
    {
        Assert.Equal(1, (int)AttachmentType.ExternalLink);
    }

    [Fact]
    public void AttachmentEntity_CanBeCreatedWithValues()
    {
        var id = Guid.NewGuid();
        var taskId = Guid.NewGuid();
        var entity = new AttachmentEntity
        {
            Id = id,
            TaskId = taskId,
            FileName = "需求文档.pdf",
            FilePath = "/attachments/42_需求文档.pdf",
            FileSize = 204800,
            ContentType = "application/pdf",
            AttachmentType = AttachmentType.LocalFile,
            CreatedAt = new DateTime(2026, 6, 16, 10, 0, 0, DateTimeKind.Utc)
        };

        Assert.Equal(id, entity.Id);
        Assert.Equal(taskId, entity.TaskId);
        Assert.Equal("需求文档.pdf", entity.FileName);
        Assert.Equal("/attachments/42_需求文档.pdf", entity.FilePath);
        Assert.Equal(204800L, entity.FileSize);
        Assert.Equal("application/pdf", entity.ContentType);
        Assert.Equal(AttachmentType.LocalFile, entity.AttachmentType);
        Assert.Equal(new DateTime(2026, 6, 16, 10, 0, 0, DateTimeKind.Utc), entity.CreatedAt);
    }

    [Fact]
    public void AttachmentEntity_ExternalLinkType_HasDefaultFileSizeZero()
    {
        var entity = new AttachmentEntity
        {
            AttachmentType = AttachmentType.ExternalLink,
            FilePath = "https://example.com/doc"
        };

        Assert.Equal(0L, entity.FileSize);
        Assert.Equal(string.Empty, entity.ContentType);
    }

    [Fact]
    public void AttachmentDto_Properties_AreMapped()
    {
        var id = Guid.NewGuid();
        var taskId = Guid.NewGuid();
        var dto = new AttachmentDto
        {
            Id = id,
            TaskId = taskId,
            FileName = "test.txt",
            FilePath = "/path/to/test.txt",
            FileSize = 1024,
            ContentType = "text/plain",
            AttachmentType = AttachmentType.LocalFile,
            CreatedAt = DateTime.UtcNow
        };

        Assert.Equal(id, dto.Id);
        Assert.Equal(taskId, dto.TaskId);
        Assert.Equal("test.txt", dto.FileName);
        Assert.Equal(1024L, dto.FileSize);
        Assert.Equal("text/plain", dto.ContentType);
        Assert.Equal(AttachmentType.LocalFile, dto.AttachmentType);
    }

    [Fact]
    public void UploadAttachmentRequest_CanBeCreated()
    {
        var taskId = Guid.NewGuid();
        var request = new UploadAttachmentRequest
        {
            TaskId = taskId,
            FileName = "report.pdf",
            Base64Content = "dGVzdA==",
            ContentType = "application/pdf"
        };

        Assert.Equal(taskId, request.TaskId);
        Assert.Equal("report.pdf", request.FileName);
        Assert.Equal("dGVzdA==", request.Base64Content);
        Assert.Equal("application/pdf", request.ContentType);
    }

    [Fact]
    public void AddLinkRequest_CanBeCreated()
    {
        var taskId = Guid.NewGuid();
        var request = new AddLinkRequest
        {
            TaskId = taskId,
            Url = "https://example.com/doc",
            FileName = "参考文档"
        };

        Assert.Equal(taskId, request.TaskId);
        Assert.Equal("https://example.com/doc", request.Url);
        Assert.Equal("参考文档", request.FileName);
    }

    [Fact]
    public void AddLinkRequest_FileName_CanBeNull()
    {
        var taskId = Guid.NewGuid();
        var request = new AddLinkRequest
        {
            TaskId = taskId,
            Url = "https://example.com/doc"
        };

        Assert.Null(request.FileName);
    }

    [Fact]
    public void TaskEntity_DefaultDescription_IsNull()
    {
        var entity = new TaskEntity();
        Assert.Null(entity.Description);
    }

    [Fact]
    public void TaskEntity_Description_CanBeSet()
    {
        var entity = new TaskEntity
        {
            Description = "这是一个多行描述，用于记录详细说明。"
        };

        Assert.Equal("这是一个多行描述，用于记录详细说明。", entity.Description);
    }

    [Fact]
    public void TaskEntity_DefaultAttachments_IsEmpty()
    {
        var entity = new TaskEntity();
        Assert.NotNull(entity.Attachments);
        Assert.Empty(entity.Attachments);
    }

    [Fact]
    public void TaskDto_IncludesDescription()
    {
        var dto = new TaskDto
        {
            Description = "测试描述"
        };

        Assert.Equal("测试描述", dto.Description);
    }

    [Fact]
    public void TaskDto_IncludesAttachmentCount()
    {
        var dto = new TaskDto
        {
            AttachmentCount = 3
        };

        Assert.Equal(3, dto.AttachmentCount);
    }

    [Fact]
    public void CreateTaskDto_IncludesDescription()
    {
        var dto = new CreateTaskDto
        {
            Title = "测试任务",
            Description = "描述内容"
        };

        Assert.Equal("描述内容", dto.Description);
    }

    [Fact]
    public void UpdateTaskDto_Description_IsOptional()
    {
        var dto = new UpdateTaskDto
        {
            Id = Guid.NewGuid(),
            Title = "更新标题"
            // 不传 Description —— 保持原值
        };

        Assert.Null(dto.Description);
    }

    [Fact]
    public void OpenAttachmentResponse_OpenedProperty()
    {
        var response = new OpenAttachmentResponse { Opened = true };
        Assert.True(response.Opened);

        var failed = new OpenAttachmentResponse { Opened = false };
        Assert.False(failed.Opened);
    }

    [Fact]
    public void Description_Property_IsDefinedOnTaskEntity()
    {
        var property = typeof(TaskEntity).GetProperty("Description");
        Assert.NotNull(property);
        Assert.Equal(typeof(string), property.PropertyType);
    }

    [Fact]
    public void Attachments_Property_IsDefinedOnTaskEntity()
    {
        var property = typeof(TaskEntity).GetProperty("Attachments");
        Assert.NotNull(property);
        Assert.Equal(typeof(List<AttachmentEntity>), property.PropertyType);
    }
}